Lathe



as.v b. suNDsTRA-Nn.

LATHE.

APPLICATION FILED JUNE II, 1920.

Patented Sept. 12, 1922.

UNITED STATES PATENT OFFICE.

GUSTAF DAVID SUNDSTRAND, 0F ROCKFORD, ILLINOIS, .ASSIGNOR TO ROCKFORD TOOL' COMPANY, OF ROCKFORD, ILLINOIS, A CORPORATION OF ILLINOIS.

LATIIE.

Application filed .Tune 11,

To all whom t may concern.'

Be it known that I, GUs'rAF DAVID SUND- s'rnAND, a citizen of the United States, residing at Rockford, in the county of N innebago and State of Illinois, have invented certain new and useful Improvements in Lathes, of which the following is a specification.

My invention relates to lathes of the general type illustrated in Patent- No. 1,825,424 issued December 16, 1919, and more specilically to an improved rear tool and transmission for automatically actuating the same,

One of the objects of the invention is to provide an improved rear tool carriage embodying, in a. unit-ary struct-ure, a complete transmission for actuating the rear tool in either direction upon movement of the front carriage in either direction.

Another object is to include means for changing the speed ratio between the movement of the front and rear tool in the transmission carried by the rear tool carriage.

Further objects and advantages of my invention will become apparent as the description proceeds.

In the accompanying drawings, Figure 1 is a perspective view of a complete lathe equipped with a rear tool according to my invention. Fig. 2 is an end view of the lathe with the tail stock removed, the rear tool and its transmission being shown in section. F ig. 8 is a front view of the rear tool and Fig. 4 is a detail section.

In the. embodiment of my invention selected for illustration, the bed 10 carries ways 12 and 14, supporting the slidable front carriage 16 and another set of ways 18 and 2O supporting the rear carriage 22 which may be clamped in position by suitable blocks 24 and clamping screws 26. Any suitable or customary means for actuating the front carriage may be provided, as, for instance.l a drive shaft 28 operating gearing in a casing 30 to drive a pinion 82 meshing with a rack 34 mounted on the bed 10.

On the rear of the front carriage I mount a rack 36 above which is placed a cover 88 to protect it from falling chips and dirt. Means for driving 'the rear tool from the rack 86 comprise a gear 40 on shaft 42, a second gear 44 on the upper end of shaft 46, a change gear 48 on the lower end of shaft 1920. Serial No. 388,211.

rear carriage. Knurled nuts provide convenient means of holding the change gears 48 and 50 in place. They may be readily removed to slip the gears ofia and interchange or replace them with other gears.

An intermediate bevel 56 horizontally journaled on shaft 58 meshes with the bevel gear 54 and with an opposing bevel gear 60 above it to drive the iirst and last bevel gears in opposite directions. A shaft 62 ro tatable in the sleeve portions of the bevel Lgears and carries av splined clutch collar' 64 adapted to engage clutch. teeth on the bevels 54 and 6() to drive the shaft in either direction. The clutch collar may be shifted by convenient means such as a pin 66 entering between flanges on the collar and carried by a shaft 68 mounted on an a-Xis eccentric to the pin and rotatable by means of a suitable hand lever 70 outside the carriage casting. As the lathe may frequently be used for a. considerable length of time without disturbing collar 64, I prefer to provide means in the nature of a set screw 69 for locking shaft 68 and collar 64 in any desired position.

The shaft 62 carries a pinion 71 meshing with a rack 72 on the bottom of a cross slide 74 which carries another longitudinally slidable support 7 6 for the rear tool holder. Any suitable means for sliding the support 76 and clamping it in position may be employed.l I have illustrated a pinion 7 8 carried by a shaft 80 having a handle 82 for rotation of the same, which pinion meshes with a. rack 84 carried by the rear edge of the support 76. A clamping screw 86 may be forced into engagement with the central part of the block 88 which engages the cross slide 74 with its heel 9() and overlies the rear portion of the support 76 at 92 to clamp it firmly in longitudinally adjusted position. 1While I have illustrated a simple. cross slide it will be obvious that a swivelled slide such 1 many modifications and variations will naturally occur tothose skilled in the art. I aim in the subjoined claims to cover all such legitimate variations and modifications,

I claim as my invention:

1. In a lathe,in combinatioma front tool carriage, a rear tool carriage, a tool slide on said rear tool carriage, a rack extending along said front carriage, and transmission mechanism entirely mounted on and supported by said rear 'tool carriage and including a gear meshing with said rac-k, for reciprocating` said rear tool slide upon longitudinal sliding movement ot said lront carriage.

2. In a lathe, in combination, a slidable front carriage, a rear carriage, a tool slide on said rear carriage and a transmission entirely supportedby'said rear carriage for driving ,said rear tool slide, said transmission including elements constantly engaged with said front carriage for actuation in either direction by longitudinal sliding movement thereof, yelements permanently associated with said rear tool slide for reciproeating said slide, and means for disconnecting said last named elements from said first named elements. A

3.- In a lathe, in combination, a front tool carriage, a reaiftool carriage, a tool slide on said rear tool carriage, a rack extending along said front carriage, and transmission mechanism entirely mounted on and supported by said rear tool carriage and including a gear' meshing with said rack, for reciprocating said rear tool slide upon loiigitudinal sliding movement of said front carriage, said transmission including a reversing clutch.

ll.v In a lathe, in combination, alongitudinally slidable front carriage, a rear carriage,

ya tool slide on said rear carriage and a transmission entirely supported by said rear carriage for driving said rear tool slide, said transmission including elements yconstantly engaged with said front carriage for actuation in either direction by longitudinal. slidt ing movement thereof, elements permanently associated with said rear tool slide for reciprocating said-slide, and means for disconnecting said last named elements from said first named elements or connecting them to said first named elements for actuation in eitherdirection.

5. In a lathe, in combination, a front tool carriage, a rear tool carriage, a tool slide on said rear tool carriage, a rack extending along said 'front carriage, and transmission ymechanism entirely mounted on and supported by said rear tool carriage for reciprocating said rear tool slide upon longitudinal sliding movement of said front carriage.

6v. In a lathe, in combination, a longitudinally slidable front carriage, a rear carriage, a tool slide on said rear carriage, and a transmission entirely supported by said rear carriage for driving said rear tool slide, said transmission including elements constantly engaged with' said front carriage for actuation in either direction by longitudinal sliding movement thereof, elements permanently associated with said rear toolvslide for reciprocating said slide, and means Yfor connecting said last named elements to said first named elements fo' actuation in either direction. f

i'. vIn a lathe, in combination, a front tool carriage, a rear tool carriage, a tool slide on said rear tool carriage, and transmission mechanism entirely mounted on and supported by said rear tool carriage for moving said rear tool slide in either direction upon longitudinal sliding movement oi said front carriage in a given direction.

S. In a lathe, in combination, a slidable front carriage, a rear carriage, a tool slide on said rear carriage, anda transmission enltirely supported by said rear carriage for driving said rear tool slide, said transmission including elements constantly engaged with saidv f'ront carriage for actuation in either direction by longitudinal sliding movement thereof, and means for connecting said elements to said slide for actuation tliereol in either direction.

9. A lathe having, in combination, a front tool carriage, a rear tool carriage, a transversely-movable tool slide on said rear tool carriage, a rack extending. along the reai edge of said front carriage, a rack extending along the tool slide, and a gear train entirely mounted on and supported by said rear tool carriage for connecting said racks.

10. In a lathe, the combination of av rear tool carriage, a sleeve rotatable on a vertical axis in said carriage and having a closed lower end, a bevel gear on said sleeve, a second bevel gear spaced from and rotatable on the saine axis assaid first mentioned gear, a third bevel gear meshing with each'ot' the other gears, a vertical shaft rotatable in and supported by said sleeve and extending through the second mentioned gear, means for 'connecting said shaft to either gear, a tool slide and an operative connection between said shaft and slide, said sleeve terminating in a downwardly projecting shaft, a change gear on the lower end of the lastmentioned shaft below'the carriage, 'a vertical shatt in said carriage forward of the first shaft, a change gear on the lower end of the third-mentioned shaift, and means to drive the third-.mentioned shaft.

1l. In a machine tool, in combination, a sleeve rotatable on a vertical axis and having), a closed lower end, a bevel gear on said sleeve, a second bevel gear spaced from and rotatable ony the same axis as Said lirst mentioned gear, a third bevel gear meshing with each of said two first mentioned gears, a vertical shat't rotatable in and supported by said sleeve and extending through said second mentioned gear, means 'for connecting said shaft to either gear, a tool slide and an operative connection between said shaft and slide, said sleeve terminating in a downwardly7 projecting shaft adapted to receive a splined gear tor the transmission of power thereto.

1 2. In a machine tool, in combination, a slidable tool carriage, means for clamping said tool carriage in adjusted position, a tool slide on said tool carriage, and a transmission for driving said. tool slide, said transmission includingchange gears and vertical shafts projecting below said carriage to receive said change gears on their projecting portions.

13. In a lathe, in combination, a slidable trent carriage, a rear carriage, a toolA slide on said rear carriage, and a transmission 'trom said troni: carriage to said tool slide, said transmission including elements constantly engaged with and driven by motion of said front carriage, and a reversible eonnection between said elements and said slide.

14. In a lathe, in combination, a slidable front carriage, a rear carriage, a tool slide on said rear carriage, a transmission from said front carriage to said tool slide, said transmission including gearing constantly engaging said front carriage for actuation thereby, said gearing including change speed gears, and a reversible connection for driving said tool slide from said gearing.

15. In a lathe, in combination, a slidable front carriage, a rear carriage, a tool slide on said rear carriage, and a transmission from said front carriage to said tool slide, said transmission being mounted on said rear carriage and including elements constantly engaged with and driven by motion ot said front carriage, and a reversible connection between said elements and said slide.

16. In a lathe, in combination, a slidable front carriage, a rear carriage, a tool slide on said rear carriage, a transmission from said front carriage to said tool slide, said transmission being mounted on said rear carriage and including gearing constantly engaging said liront carriage for actuation thereby, said gearing including change speed gears, and a reversible connection for driving said tool slide trom said gearing.

In testimony whereof, I have hereunto set my hand.

GUSTAF DAVID SUNDSTRAND. 

